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首页> 美国卫生研究院文献>Journal of Advanced Research >Urease-aided calcium carbonate mineralization for engineering applications: A review
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Urease-aided calcium carbonate mineralization for engineering applications: A review

机译：脲酶辅助碳酸钙矿化技术在工程中的应用

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class="kwd-title">Keywords: Urease, CaCO3, Biomineralization, Soil and sand, Construction materials, Groundwater class="head no_bottom_margin" id="ab010title">AbstractInducing calcium carbonate precipitation is another important function of urease in nature. The process takes advantage of the supply of carbonate ions derived from urea hydrolysis and of an increase in pH generated by the reaction, effects that in the presence of Ca2+ ions lead to the precipitation of CaCO3. Further to its importance in nature, if performed in a biomimetic manner, the urease-aided CaCO3 mineralization offers enormous potential in innovative engineering applications as an eco-friendly technique operative under mild conditions, to be used for remediation and cementation/deposition in field applications in situ. These include among others, the strengthening and consolidation of soil/sand, the protection and restoration of stone and concrete structures, conservation of stone cultural heritage materials, cleaning waste- and groundwater of toxic metals and radionuclides, and plugging geological formations for the enhancement of oil recovery and geologic CO2 sequestration. In view of the potential of this newly emerging interdisciplinary branch of engineering, this article presents the principles of urease-aided calcium carbonate mineralization apposed to other biomineralization processes, and reviews the advantages and limitations of the technique compared to the conventional techniques presently in use. Further, it presents areas of its existing and potential applications, notably in geotechnical, construction and environmental engineering, and its future perspectives.
机译：<！-fig ft0-> <！-fig @ position =“ anchor” mode =文章f4-> <！-fig mode =“ anchred” f5-> <！-fig / graphic | fig / alternatives / graphic mode =“ anchored” m1-> class =“ kwd-title”>关键字：脲酶，CaCO3，生物矿化，土壤和沙子，建筑材料，地下水 class =“ head no_bottom_margin摘要诱导碳酸钙沉淀是脲酶在自然界中的另一个重要功能。该方法利用了尿素水解产生的碳酸根离子的供应和反应产生的pH值的增加，从而在存在Ca 2 + 离子的情况下导致了CaCO3的沉淀。除了其在自然界中的重要性外，如果以仿生方式进行，脲酶辅助的CaCO3矿化作为在温和条件下可操作的生态友好技术，在创新工程应用中具有巨大潜力，可用于现场应用中的修复和胶结/沉积原地。其中包括加强和巩固土壤/沙土，保护和修复石头和混凝土结构，保护石头文化遗产材料，清洁废物和地下水中的有毒金属和放射性核素以及堵塞地质构造以增强采油和地质二氧化碳封存。考虑到这个新兴的跨学科工程分支的潜力，本文介绍了尿素酶辅助碳酸钙矿化应用于其他生物矿化过程的原理，并综述了该技术与目前使用的常规技术相比的优势和局限性。此外，它还介绍了其现有和潜在应用领域，尤其是在岩土，建筑和环境工程领域，以及其未来前景。

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